Cost is clearly a huge factor in any component selection, but initial cost and expected life are just one part of this. You must also understand the motor’s efficiency ranking, as this will element in whether it operates cost-effectively or not. Furthermore, a component that’s easy to repair and maintain or is easily changed out with other brands will certainly reduce overall program costs ultimately. Finally, consider the motor’s size and weight, as this will effect the size and weight of the system or machine with which it is being used.
Hydraulic motors may use different types of fluids, which means you got to know the system’s requirements-does it need a bio-based, environmentally-friendly fluid or fire resistant a single, for instance. In addition, contamination could be a problem, so knowing its resistance amounts is important.
You must know the maximum operating pressure, speed, and torque the motor will need to accommodate. Knowing its displacement and movement requirements within something is equally important.
At the medium-pressure and cost range, vane motors feature a housing with an eccentric bore. Vanes rotor slide in and out, operate by the eccentric bore. The movement of the pressurized liquid causes an unbalanced push, which forces the rotor to turn in one direction.
Piston-type motors can be found in a number of different designs, including radial-, axial-, and other less common styles. Radial-piston motors feature pistons organized perpendicularly to the crankshaft’s axis. As the crankshaft rotates, the pistons are moved linearly by the fluid pressure. Axial-piston designs include a amount of pistons organized in a circular pattern inside a housing (cylinder block, rotor, or barrel). This casing rotates about its axis by a shaft that’s aligned with the pumping pistons. Two styles of axial piston motors exist-swashplate and bent axis types. Swashplate styles feature the pistons and drive shaft in a parallel arrangement. In the bent axis version, the pistons are arranged at an position to the primary drive shaft.
Of the lesser used two designs, roller celebrity motors offer lower friction, higher mechanical effectiveness and higher start-up torque than gerotor designs. Furthermore, they provide smooth, low-speed operation and provide longer life with much less put on on the rollers. Gerotors provide continuous fluid-tight sealing throughout their soft operation.
Specifying hydraulic motors
There are several considerations to consider when selecting a hydraulic motor.